USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications
Datasheet
3.1
Ball Descriptions
This section provides a detailed description of each ball. The signals are arranged in functional groups
according to their associated interface.
The “_N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal
is at a low voltage level. For example, RESET_N indicates that the reset signal is active low. When
“_N” is not present after the signal name, the signal is asserted when at the high voltage level.
The terms assertion and negation are used exclusively. This is done to avoid confusion when working
with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a
signal is active, independent of whether that level is represented by a high or low voltage. The term
negate, or negation, indicates that a signal is inactive.
Note: The buffer type for each signal is indicated in the BUFFER TYPE column of Table 3.1. A
description of the buffer types is provided in Section 3.3.
Table 3.1 Ball Descriptions
NUM
BALLS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
USB/HSIC INTERFACES
Upstream
USB D+
(Flex Port 0)
DP0
DM0
AIO
AIO
Upstream USB Port 0 D+ data signal.
Note:
The upstream Port 0 signals can be
optionally swapped with the
downstream Port 1 signals.
1
1
1
1
Upstream
USB D-
(Flex Port 0)
Upstream USB Port 0 D- data signal.
Note:
The upstream Port 0 signals can be
optionally swapped with the
downstream Port 1 signals.
Downstream
HSIC Data
(Swap Port 1)
DATA1
STRB1
HSIC
HSIC
Downstream HSIC Port 1 DATA signal.
Note:
The downstream Port 1 signals can be
optionally swapped with the upstream
Port 0 signals.
Downstream
HSIC Strobe
(Swap Port 1)
Downstream HSIC Port 1 STROBE signal.
Note:
The downstream Port 1 signals can be
optionally swapped with the upstream
Port 0 signals.
Downstream
USB D+
(Port 2)
DP2
DM2
DP3
DM3
AIO
AIO
AIO
AIO
Downstream USB Port 2 D+ data signal.
Downstream USB Port 2 D- data signal.
Downstream USB Port 3 D+ data signal.
Downstream USB Port 3 D- data signal.
1
1
1
Downstream
USB D-
(Port 2)
Downstream
USB D+
(Port 3)
Downstream
USB D-
1
(Port 3)
SMSC USB3813
11
Revision 1.0 (06-17-13)
DATASHEET
SMSC [ SMSC CORPORATION ]
